J. Eur. Opt. Society-Rapid Publ.
Volume 19, Number 1, 2023
|Number of page(s)||20|
|Published online||13 January 2023|
Comments about birefringence dispersion, with group and phase birefringence measurements in polarization-maintaining fibers
iXblue Photonics, Rue Paul Sabatier, 22300 Lannion, France
2 iXblue, 34 Rue de la Croix de Fer, 78100 Saint-Germain-en-Laye, France
3 Laboratoire Hubert Curien, UJM-CNRS-IOGS, 18 Rue Professeur Benoît Lauras, 42000 Saint-Etienne, France
* Corresponding author: email@example.com
Accepted: 27 November 2022
A recent JEOS-RP publication proposed Comments about Dispersion of Light Waves, and we present here complementary comments for birefringence dispersion in polarization-maintaining (PM) fibers, and for its measurement techniques based on channeled spectrum analysis. We start by a study of early seminal papers, and we propose additional explanations to get a simpler understanding of the subject. A geometrical construction is described to relate phase birefringence to group birefringence, and it is applied to the measurement of several kinds of PM fibers using stress-induced photo-elasticity, or shape birefringence. These measurements confirm clearly that the difference between group birefringence and phase birefringence is limited to 15–20% in stress-induced PM fibers (bow-tie, panda, or tiger-eye), but that it can get up to a 3-fold factor with an elliptical-core (E-core) fiber. There are also surprising results with solid-core micro-structured PM fibers, that are based on shape birefringence, as E-core fibers.
Key words: Birefringence / Birefringence dispersion / Channeled-spectrum analysis / Group birefringence / Phase birefringence / Polarization-maintaining fiber / Polarization-mode dispersion
© The Author(s), published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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